potentpoefie
Fanatic
Hi guys
Thursday I finally got my M&P10 (sku 811308) and Friday night I headed over to a friend's house to get some parts fitted that I've had for awhile now. He has the workshop and all the AR tools a man can ask for.
Installed the Troy VTAC Alpha 308 LP 13" rail. Mostly because I've been more than happy with my M&P15 VTAC II. So big brother must look exactly like little brother. Of course to get this rail to fit a low profile gas block was needed. So installed the Troy .750 1" low profile gas block. Lubed the firearm and put it back together. Looked pretty sweet.
Got to the range Saturday and the first 20 rounds or so ran fine. Then it started to give failures to feed. Ejects the round just fine but fails to feed the next one from the magazine. Of course the first place I looked for the fault was the magazine. Had 4 there. 2 x Gen 3 PMags and 2 x Gen unknown PMags. Both 20 rounders. Give issues with all mags but it was intermittent. Sometimes it would work and other times 4 out of 5 shots you would have to rack the next round in yourself. Let's just say my charging handle and I really got to know each other on Saturday. The bolt would also fail to lock back after the last round intermittently.
Now I'm not a gunsmith at all and figured it was just a new gun that needed running in but then again "we" did mess with it. I've looked at the bolt key and it is perfectly fine. Locked and pinned in. Didn't mess with that. My first guess, and I'm no gunsmith, is that the action isn't getting enough gas and thus doesn't have enough energy to take the bolt far enough back to chamber the next round. Could it be that the gas block is misaligned with the gas port on the barrel and thus not enough gas is coming through? Or is my choice of low profile gas block poor? Didn't see any mention of the gas block being only for AR15 platform.
****Edit****
Was just over at the S&W forum. So the gun is short cycling. (Got the technical term now). Ammo used was Norinco surplus 7.62x51 147gr ammo. Could the ammo be under powered? Not like the Chinese to load weak loads. Also I would like the rifle to work with all kinds of ammo.
*************
What do you guys think could be the problem?
P.S. The positive from the day:
1. Loved the Vortex Spitfire. Took it from the box. Mounted it on the gun and it was zeroed. Took it off during the day and put it back and it held it's zero.
2. Even though my M&P10 was a bolt gun most of the time the gun hits everything I put the sights on. Fine shooter.
Thursday I finally got my M&P10 (sku 811308) and Friday night I headed over to a friend's house to get some parts fitted that I've had for awhile now. He has the workshop and all the AR tools a man can ask for.
Installed the Troy VTAC Alpha 308 LP 13" rail. Mostly because I've been more than happy with my M&P15 VTAC II. So big brother must look exactly like little brother. Of course to get this rail to fit a low profile gas block was needed. So installed the Troy .750 1" low profile gas block. Lubed the firearm and put it back together. Looked pretty sweet.
Got to the range Saturday and the first 20 rounds or so ran fine. Then it started to give failures to feed. Ejects the round just fine but fails to feed the next one from the magazine. Of course the first place I looked for the fault was the magazine. Had 4 there. 2 x Gen 3 PMags and 2 x Gen unknown PMags. Both 20 rounders. Give issues with all mags but it was intermittent. Sometimes it would work and other times 4 out of 5 shots you would have to rack the next round in yourself. Let's just say my charging handle and I really got to know each other on Saturday. The bolt would also fail to lock back after the last round intermittently.
Now I'm not a gunsmith at all and figured it was just a new gun that needed running in but then again "we" did mess with it. I've looked at the bolt key and it is perfectly fine. Locked and pinned in. Didn't mess with that. My first guess, and I'm no gunsmith, is that the action isn't getting enough gas and thus doesn't have enough energy to take the bolt far enough back to chamber the next round. Could it be that the gas block is misaligned with the gas port on the barrel and thus not enough gas is coming through? Or is my choice of low profile gas block poor? Didn't see any mention of the gas block being only for AR15 platform.
****Edit****
Was just over at the S&W forum. So the gun is short cycling. (Got the technical term now). Ammo used was Norinco surplus 7.62x51 147gr ammo. Could the ammo be under powered? Not like the Chinese to load weak loads. Also I would like the rifle to work with all kinds of ammo.
*************
What do you guys think could be the problem?
P.S. The positive from the day:
1. Loved the Vortex Spitfire. Took it from the box. Mounted it on the gun and it was zeroed. Took it off during the day and put it back and it held it's zero.
2. Even though my M&P10 was a bolt gun most of the time the gun hits everything I put the sights on. Fine shooter.