Comments on: PTR44 locking shoulder damage https://gunlab.net/ptr44-locking-shoulder-damage/ Adventures in gun building! Sat, 11 Apr 2026 23:49:22 +0000 hourly 1 https://wordpress.org/?v=4.1.41 By: Chuck https://gunlab.net/ptr44-locking-shoulder-damage/#comment-15450 Sun, 15 May 2016 20:44:17 +0000 http://gunlab.net/?p=5857#comment-15450 A gentlemen that I found to be very knowledgeable on the MP-44 mentions that the damage to the locking shoulder is due to slam firing.

]]> By: snal https://gunlab.net/ptr44-locking-shoulder-damage/#comment-15360 Tue, 10 May 2016 16:18:49 +0000 http://gunlab.net/?p=5857#comment-15360 “It looks to me like the PTR 44 piece was only making partial contact and got peened over. The MP44 part looks as though it had full face contact and was able to absorb the stress.”

yes imo this is the problem !

maybe a leather or rubber buffer can help ?

]]> By: Storm https://gunlab.net/ptr44-locking-shoulder-damage/#comment-15308 Sat, 07 May 2016 02:01:31 +0000 http://gunlab.net/?p=5857#comment-15308 It could be that it is only case hardened (expl.file test), as opposed to original which is I presume fully hardened.

]]> By: Ed https://gunlab.net/ptr44-locking-shoulder-damage/#comment-15305 Sat, 07 May 2016 01:28:22 +0000 http://gunlab.net/?p=5857#comment-15305 Greetings,
It looks to me like the PTR 44 piece was only making partial contact and got peened over. The MP44 part looks as though it had full face contact and was able to absorb the stress.

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