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Posted: 1/21/2011 6:17:52 PM EDT
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Purchased a brand new Spikes lower to use with a Tactical Solutions .22 cal. upper.1st trip to the range and started having trigger reset problems. Would have to drop the mag, pull back on the charging handle, which would eject the live round, put mag back, and continue shooting sometimes 3 rounds, sometimes 4 rounds until the trigger would not reset again. Also, had two occasions where I had two round bursts. Took the TS upper off the spikes lower and used a Stag lower. Ran 150 rounds of .22cal ammo without a glitch. Put the Spikes lower onto the Stag upper and ran 60 rounds each of .223 and 5.56mm without a glitch.
Came home, disassembled the hammer, disco, and trigger assembly... It all looked good, reassembled. Ran several more mags of .22 with the Spikes lower and continued having trigger reset problems. Anybody got any ideas? |
Photo a photo of the trigger group in the receiver looking straight down like this.
Check to make sure that you have the disco spring installed large coil downward and the correct disco spring in place. 
And need to know the gap between the disco and rear hammer sear when you lower the hammer back with the trigger at rest so the two sear as close as they can be together (read should have a free gap of around .001 to .003). Lastly, where you firing the rifle from a bench, or free standing? |
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Quoted:
http://s602.photobucket.com/albums/tt103/Gofish134/?action=edit¤t=029.jpg I was firing off a rest to determine which ammo had the better groups.............ED Free gap between the disco and back of hammer sear is too large, and allowing you to bump the rifle on the bench. You can solve this problem by fully pulling and retaining the trigger so you do bump it (read no more light trigger squeezes), or you can retime the disco to the .001 to .003 free gap so the you have to fully release the trigger before the disco will release it. To retime a disco, you remove metal from the front/bottom of it where is seats against the front/top of the trigger. The closes the free gap, and allows the disco to retain the hammer longer/better so you don't dance the trigger by accident. |
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Just back from the range............Again.
Last night I took the hammer,disco and trigger springs out and put a set of J P Enterprises reduced power springs in the Spikes lower and WA-LAA, she ran 20 mags of 26 round federal bulk, thats 520 rounds and the only problem I had was 1 squib, the shell casing had a good hard hit on it but just didn't fire. I rotated the round 180 degrees and it fired, leaving an identical dent in the rim of the cartridge. Didn't even uncase the Stag or fire any .223 today. But my daughter and I did take "Sneaky Pete", the J frame S&W .38 w/ a 1 7/8" barrel just to re-establish our competency with the little feller. The way I see it, the .22 recoil didn't have enough power to reset the hammer every time with the standard hammer spring, so putting a set reduced power springs in made it possible for the little .22 recoil to reset the hammer and trigger...............Ed |
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