pdsmith505
Member
- Joined
- Mar 9, 2013
- Messages
- 736
I used an Anderson Arms LPK on a recent 300 BLK pistol build and ran into an issue that ended up being caused by the bolt catch bending.
After 6 magazines or so (so 6 cycles on the bolt catch), it became near impossible to release the bolt using the bolt catch.
Since I was using hard cast and coated 240gr bullets, I figured that some kind of buildup was the cause, but, upon removing the bolt catch, it was apparent to the naked eye that the bolt catch was bent. I hammered it back to flat, and it works well now.
I can think of two possibilities for this:
1) The bolt catch is defective and not strong enough
2) Something about the 240gr loading allows enough time between the bolt cycling forward and the magazine follower allows the BCG to gain enough momentum to bend a properly built bolt catch.
It can't be the weight of the round on the magazine, since there is not a round in the magazine during the last shot... but the gun could be cycling too hard/fast causing excessive energy in the bolt.
Has anyone else had this issue? Any suggestions for a fix?
I'm thinking the best solution is ponying up for an adjustable gas block to fine tune the gun based on the rounds being fired.
Relevant specs on the gun:
Palmetto Armory stripped upper
Palmetto Armory H2 buffer
Palmetto Armory premium BCG
SOTA arms 10.5" .300 BLK barrel (Pistol gas)
Running suppressed
After 6 magazines or so (so 6 cycles on the bolt catch), it became near impossible to release the bolt using the bolt catch.
Since I was using hard cast and coated 240gr bullets, I figured that some kind of buildup was the cause, but, upon removing the bolt catch, it was apparent to the naked eye that the bolt catch was bent. I hammered it back to flat, and it works well now.
I can think of two possibilities for this:
1) The bolt catch is defective and not strong enough
2) Something about the 240gr loading allows enough time between the bolt cycling forward and the magazine follower allows the BCG to gain enough momentum to bend a properly built bolt catch.
It can't be the weight of the round on the magazine, since there is not a round in the magazine during the last shot... but the gun could be cycling too hard/fast causing excessive energy in the bolt.
Has anyone else had this issue? Any suggestions for a fix?
I'm thinking the best solution is ponying up for an adjustable gas block to fine tune the gun based on the rounds being fired.
Relevant specs on the gun:
Palmetto Armory stripped upper
Palmetto Armory H2 buffer
Palmetto Armory premium BCG
SOTA arms 10.5" .300 BLK barrel (Pistol gas)
Running suppressed