Air Arms 410SL / 510 Regulator Installation
Got an Audrius Reg from CygnusX that he had imported via mule (mother in law).
Work is very nice
I’ve never had this rifle apart, have messed with the stock and other stuff but the gun has been in one piece since I got it in 2007 so all this was new to me.
After dry firing to empty the tank I loosened the two set screw’s on the barrel band.
That allows it to slide right off
This uncover’s two pin wrench hole’s in the fill valve assembly. I expected the fill end to unscrew but the entire tube unscrewed which ended up being a good thing.
Because it exposed this little peice I wasnt expecting.
Brass tube with a small hole in the end that I hadnt seen in any of the other 410 installation pic’s – appear’s to be a basic attempt at regulation but get’s in the way of the real reg I want to install.
Checked the T.W CHamber’s site (http://www.gunspares.co.uk/ great resource for Schematics and spares) and discovered that it is called the “firing pot” (PW175). It’s on the AA510 page as that is what the 410 Side Lever is called in the UK.
Removed the gauge and loosened a small set screw which retained the pot in place.
I had hoped just to remove it, but it holds the valve return spring…..
The spring is retained by only a small portion of the “pot”, the extra is just an empty space so I chucked it in the lathe and parted the excess of.
This shows after parting and you can see the part that the spring is held up agaisnt
I faced off down to that shelf t get a much shorter pot.
That gave enough room for the regulators included spacer.
This is a string I shot before installation. 2900 PSI, JSB Exact’s
Shot fps ft/lbs
1 915 29.57
2 920 29.89
3 926 30.28
4 938 31.07
5 934 30.81
6 943 31.40
7 939 31.14
8 943 31.40
9 937 31.01
10 936 30.94
11 940 31.20
12 934 30.81
13 929 30.48
14 928 30.41
15 928 30.41
16 926 30.28
17 923 30.09
18 918 29.76
19 914 29.50
20 909 29.18
21 910 29.24
22 907 29.05
23 902 28.73
24 896 28.35
25 894 28.22
26 890 27.97
27 888 27.85
28 883 27.53
29 879 27.29
30 875 27.04
Unfortunatly the gauge o-ring had not been placed in the recess when it was installed so it was crushed and I couldn’t re-use it. Took my air compressor’s auto drain apart to find an o-ring that would work – but its still got an audible leak until the Hardware store opens.
This is string with regulator installed with a leak so I’d expect more shot’s. Same fill and pellet.
Shot fps ft/lbs
1 882 27.47
2 887 27.78
3 884 27.60
4 885 27.66
5 891 28.04
6 890 27.97
7 888 27.85
8 892 28.10
9 889 27.91
10 890 27.97
11 889 27.91
12 892 28.10
13 892 28.10
14 891 28.04
15 886 27.72
16 891 28.04
17 892 28.10
18 892 28.10
19 890 27.97
20 891 28.04
21 892 28.10
22 889 27.91
23 890 27.97
24 887 27.78
25 877 27.16
26 865 26.42
27 860 26.12
28 852 25.63
29 845 25.22
30 841 24.98
Seems to drop off the regulator around shot 25.
Chart of both results, unregged in Red, regged in Green.
Once I get a replacement gauge block o-ring I’ll do a new string which I expect to be a bit longer.
I’m happy with the string so will likely drill the vent hole in the air reservoir at some point (and possibly duracoat the tube as I’m sick of wiping it down after shooting).
All Replies
sorry,
do you need a possum?
i don`t understand the question… 🙄
@Yellow Ninja can you help me… have you a answer about my question.
thanks and goodbye from german
With all that high tech equipment i see in the photo, i like the addition of the folding wooden tape measure. 😆 Judging by the flora, i’m guessing there either are presently, or used to be a lot of furry targets? Nice setup. Keep posting, we won’t hassel you too much about the engrish, and would love to see more of your country side. 😀
Your English is better than mine!
I can’t answer your question, but I did notice that very nice Weaver to dovetail mount adapter. Did you make that yourself?
Your shooting table is nicely set up. At first I thought you were using propane instead of air, but I looked closer and saw that is apparently a dive cylinder connected to your rifle. What device is that between the rifle and the white cylinder?
Welcome to our group. I hope someone smarter, and better looking than me, can answer your original question.
Kindly ‘Ol Uncle Hoot 😯
PS: Do you need a possum?
hello guys,
i`m new here in your forum and my name is toni and i`m from germany.
i read very interesting in this thread and many others.
i have a Audrius Reg and will the reg install at the next time.
i have one big question ❗ ❓
must be the bypass by the valespring?
is the milling also for more volume?
sorry for my bad english… 😕
thanks
I will measure my airtube when I get a chance.
I fill to 3000psi.
I could adjust the regulator for a higher pressure to get fewer higher powered shot’s – I think people who do this get around 65 shots at 30 fpe with the 410extra. Not sure if mine would do that.
The pot contains two chambers – one for the spring and one is supposed to meter air. I cut all of the metering part off so there is just enough to retain the spring.
Two questions:
My S510 has a 16″ air tube, measured from breech seam to fill seam.
1) How long is your air tube?
My recommended fill is 190 bar for best results, per AA.
2) With 130 shots, how high did you fill?
Very interesting results. I am considering the A’s regulator, but unless the shot count goes up, and I can stay at near full power, it’s not worth the $100 to me. I’m going to reread your firing pot reduction and consider that, but the valve work exceeds my ability and tools.
About how much firing pot did you leave in place, lengthwise?
Regards,
Hoot 😯
I finally had a chance/frame of mind to get back to this and drill out the extra holes to bypass the valve spring retainer.
I didnt go down as far as I could because I wanted a large margin of safety so I didnt drill into the valve seat.
And with the valve spring retainer installed you can see how the air can now bypass it.
Power is lower than before. I think I changed the regulator’s pressure down a bit.
130 shot string with .22 JSB’s (empty = chrony error)
1
2
3 – 745
4 – 745
5 – 743
6 – 745
7 – 734
8 – 749
9 – 746
10 – 737
11
12 – 747
13
14
15 – 756
16 – 751
17 – 754
18 – 743
19 – 758
20 – 748
21 – 743
22
23 – 756
24 – 750
25 – 749
26
27
28
29
30 – 739
31 – 752
32 – 738
33 – 734
34 – 745
35 – 733
36 – 745
37 – 755
38 – 744
39 – 753
40 – 743
41 – 752
42 – 753
43 – 741
44 – 753
45 – 749
46 – 743
47 – 748
48 – 751
49 – 743
50
51 – 736
52 – 743
53 – 747
54 – 732
55
56
57 – 746
58 – 746
59 – 734
60
61 – 746
62 – 739
63 – 737
64 – 748
65 – 729
66 – 753
67 – 754
68 – 741
69 – 741
70 – 747
71 – 718
72
73 – 761
74 – 763
75 – 774
76 – 772
77 – 779
78 – 779
79 – 774
80 – 790
81 – 777
82 – 782
83 – 791
84 – 794
85 – 795
86 – 792
87 – 800
88 – 804
89 – 804
90 – 803
91 – 795
92 – 794
93
94 – 801
95 – 801
96 – 796
97 – 801
98 – 801
99 – 801
100 – 799
101 – 792
102 – 789
103 – 788
104 – 784
105 – 782
106 – 778
107 – 779
108 – 762
109 – 770
110 – 768
111 – 759
112 – 760
113 – 745
114 – 742
115 – 740
116 – 733
117 – 726
118 – 719
119 – 716
120 – 704
121 – 705
122 – 697
123 – 690
124 – 680
125 – 673
126 – 668
127 – 658
128 – 653
129 – 641
130 – 633
and a chart
Strange little bump at the end….
I am waiting on a few parts before my reg install, I purchased two regs from a fella in the UK for a TDR and S410Xtra.
My idea was to have two custom machined adapters to replace the regs after drilling the vent hole so a new reservoir won’t be required. Ideally once my parts are ordered and in my hands, I will have the option of removing the regs and running the gun stock again if they develop problems. The AA air metering system is pretty basic in it’s stock form.
Thanks, Terry
My 410 is still in peice’s, no problems with the reg or the gun.. just stuff came up.
I did drill the hole, no problems. VERY small drill bit – countersunk the hole with a quick twist of a countersink by hand and removed the interior bur with a peice of aluminum rod about 2x diameter of the hole.
I wouldnt patch the hole if I went back. You could make a tube with o-ring’s at each end – just like a hollowed out reg to seal off the hole, but I’d buy a new reservoir.
Thanks, Terry
It’s that time of the year where I get back into my S410, the summer months is filled with IPSC competitions. I just bagged 4 raccoons this weekend – 2 on Friday night and 2 more just now. Hope this solves my raccoon problem.
Anyhow to answer your question… Since April/May till now the air has not leaked out, still reading 140Bar which is where it was left off the back in May/June.
Yes I have the relief hole drilled. You have to have it or the reg won’t reg your shots consistantly. Just be sure to lightly sand inside the tube where you drilled or the tiny burrs will cut and damage the reg’s o-rings when you install it.
Once you’re reg’ed you won’t go back to non-reg’ed, at least not for me. None of this Bell-curve BS business. Pure tack driver and I mean tack driver – One hole groups, not this clover leaf business.
If you had to go back… I’ve ask and a new tube is cheap to buy.
According to TopGun AirGuns…a Classic tube is $77.00..So, if you had to replace it, it wouldn’t break the bank.. FYI.
I have a bolt action S410 Classic
Thanks, Terry
I did not drill my tube Terry.. My gun is a Beeman Falcon .22cal full length.. I
have not seen any weird FPS increases or decreases… At least not enough to
show up at 80yds..
I am interested in your two regulator applications, did you drill the pressure tube to keep pressure levels in the center of the regulator at atmosphere? That is the only thing that I don’t like about this regulator thing. I guess a guy could always buy a new or used pressure tube if things didn’t work out. If you did not drill the pressure tube, does the valve lockup? Any insight would be appreciated.
I have a bolt action S410 Classic
Thanks, Terry
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Hi,
just have my regulator from Altaros (nice guy!!)….find it easier than drilling a hole underneath the regulator on your main tube.
I have a local made pcp which not as good as AA and others, but it suit me enough to kick some small to medium game targets.
Few things which concern most about increasing power and having enough consistency shots are pressure setup on regulator (preferably 1800 psi or more unless you have big big momma main tube) and enough pressure volume (drilling or adding more chamber) which has been done by most of us here….
The other factors which also may affect the fps increase is by cutting a tiny portion of your valve spring (this will reduce the spring pressure and increase the knocking by the hammer in resulting more airflow from regulator chamber).
I hope this may help a little as I still learning as well… 🙂
Please correct me if I’m wrong.
ciao