New gun will cycle and hold the bolt open on the last round when resting the gun on the mag for stability. When shooting form that position everything is amazing.
But when standing, the bolt will not hold open on the last round. It cycles through ammo fine, just won't hold open on the last round when I'm standing.
I tried 4 mags and 2 types of ammo (Winchester m193 white box and PMC X-Tac 55gr).
The magazine follower clearly engages the bolt catch and can be seen when taking the gun apart (looking at just the lower). The mag does not slide up or down any, either, once seated (I pulled and pushed on it while the lower had been separated from the upper so I could see what the magazine was doing). There really was no movement up/down which makes me think it isn't an issue of the gun being rested on the mag that causes the catch to work versus standing (although, I am totally OK with being wrong... I'm still learning).
It has an 11.5" barrel, non-adjustable gas black, ToolCraft BCG and a Super 42 H3 buffer/spring. Both receivers are Aero. Bolt catch and mag release were from a CCMG LPK.
Any ideas what may be causing the issue?
Sorry if I posted this in the wrong place.
Thanks for any help/guidance anyone can offer. I'm still a bit of a novice (especially with the mechanical aspects of an AR) and always trying to learn (and constantly discovering just how little I know!).
But when standing, the bolt will not hold open on the last round. It cycles through ammo fine, just won't hold open on the last round when I'm standing.
I tried 4 mags and 2 types of ammo (Winchester m193 white box and PMC X-Tac 55gr).
The magazine follower clearly engages the bolt catch and can be seen when taking the gun apart (looking at just the lower). The mag does not slide up or down any, either, once seated (I pulled and pushed on it while the lower had been separated from the upper so I could see what the magazine was doing). There really was no movement up/down which makes me think it isn't an issue of the gun being rested on the mag that causes the catch to work versus standing (although, I am totally OK with being wrong... I'm still learning).
It has an 11.5" barrel, non-adjustable gas black, ToolCraft BCG and a Super 42 H3 buffer/spring. Both receivers are Aero. Bolt catch and mag release were from a CCMG LPK.
Any ideas what may be causing the issue?
Sorry if I posted this in the wrong place.
Thanks for any help/guidance anyone can offer. I'm still a bit of a novice (especially with the mechanical aspects of an AR) and always trying to learn (and constantly discovering just how little I know!).