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If you can push on the bottom of the bolt catch, and manually lock the bolt back against the bolt catch, but your weapon will not feed and chamber a round from the magazine upon pressing the bolt catch, then either your rifle receiver extension (buffer) spring is too weak or incorrect, or your magazine is overloaded, or your (metal) magazine ...
With the catch working via a hand cycle, then it's a stoking problem for the bolt not locking back. Start with the easy once since you have a telescoping butt stock that uses a carbine spring and buffer, and make sure that the recoil spring is 10.5" long, and not 11.75 instead. The longer spring in
One thing I have seen and heard of plenty of is inadvertent bolt drops, inadvertent bolt locks, and failed bolt locks, and even a rare accidental discharge from slipped trigger figures. All of which have a much more significant time loss, than just following the traditional manual of arms of insert mag, and then drop the bolt release with your ...
Just a little more info. It does not work with an empty magazine in it, or without a magazine. Without the empty mag in it I did press the bolt catch to where it hold the BCG back, but all I have to do is set the rifle down, or tap the butt of the rifle on the ground, and the BCG slams forward.
Mega SBR with a threaded bolt catch pin. I can only surmise that I must have put thread locker on the bolt catch pin and somehow spilled some in the process, getting it on the plunger and plunger spring. I've disassembled the bolt catch but the plunger is stuck in the hole. Light/medium tapping only pushed it in further.
For instance, Mega Maten lower receivers have a similar issue where the bolt catch does not protrude far enough upwards to fully support the bottom bolt lugs in the locked back position. With my maten lower, I simply replaced the original bolt catch with an LMT bolt catch (its the sr-25 style one) and it works perfectly now.
The reason I put the bolt catch on today is because I finally received the roll pin holder after waiting for over a month. Posted: 11/29/2014 9:29:52 AM EST [#10]
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The bolt catch works fine and has spring tension when not engaged. However, the catch itself seems like it is either not thick enough, or the slot that the catch rides in is too wide. The lower is a Black Rain Ordnance (BRO) and the catch is an Armalite.
I rounded the tip of an automatic center punch to work with the bolt catch roll pin. Its basically a spring loaded rollpin punch. It's gotten me through a few builds without any drama. They only cost about $5 at Menards. I used bolt cutters to snip off the tip. You can insert the punch bit into a drill and file/round it down pretty quickly.