[tacticalfun]

Sounds good.

[KG7IL]

Looking very good.
Makes me want to get a multi-caliber pistol lower and get started.

[kytowboater]

Originally Posted by tacticalfun

Sounds good.

Is there a big difference from the full auto carrier or semi? Such as the full auto being more desirable? I bought what was there, it came with the upper.

[tacticalfun]

Originally Posted by kytowboater

Is there a big difference from the full auto carrier or semi? Such as the full auto being more desirable? I bought what was there, it came with the upper.

Its a toss up. I personally buy double locking bcg's. They all work well.

[purehavoc]

Originally Posted by Quentin

Why not press DSA for BCG specs, I don't see any in your upper description. No way to be sure looking at the pictures. If they're proud of their product they will spell out the details, if they won't tell you - well that tells you something too.

I have a friend that is a shooter for DSA, great people there and if there is a problem , They will take care of you . Unfortunantly right now they are so far behind on barrels and basically everything , my buddy tried to hit me up for one of my colt target barrels as even being a shooter for them he cant get all the goods he has on order either . I told him its like that every where not just DSA

[Quentin]

Originally Posted by kytowboater

Found it.

Detailed Description
ZM4/AR15 Semi Auto, Complete Bolt Group Assembly. Gas Key Installed, Carrier Chrome Plated Internaly.

Good/ bad?

Ill call Monday and ask about testing etc.

Well that's not telling you much, basically a chrome lined AR-15 SA carrier. Nothing about the bolt itself. I'd be curious to hear what they say when you call.

The following is the gold standard, BCM specs for their BCG:

Features
•Milspec Carpenter No. 158® steel
•HPT Bolt (High Pressure Tested/ Proof)
•MPI Bolt (Magnetic Particle Inspected)
•Shot Peened Bolt
•Chrome Lined Carrier (AUTO)
•Chrome Lined Gas Key
•Gas Key Hardened to USGI Specifications
•Grade 8 Hardened Fasteners
•Key Staked Per Mil-Spec
•Tool Steel Extractor
•BCM Extractor Spring
•Black Extractor Insert
•Mil-Spec Crane O-Ring

[Quentin]

Originally Posted by kytowboater

Is there a big difference from the full auto carrier or semi? Such as the full auto being more desirable? I bought what was there, it came with the upper.

Many of us want the heavier auto carrier instead of semi. There's about 1/2 oz difference. As long as the SA carrier shrouds the firing pin it's not a huge issue since you can get a heavier buffer to add mass to the recoil/charging action. If you think functioning is harsh (and since you have carbine length gas) I'd think about an H2 buffer and be done with it.

[kytowboater]

Originally Posted by Quentin

Many of us want the heavier auto carrier instead of semi. There's about 1/2 oz difference. As long as the SA carrier shrouds the firing pin it's not a huge issue since you can get a heavier buffer to add mass to the recoil/charging action. If you think functioning is harsh and you have carbine length gas I'd think about an H2 buffer and be done with it.

So if the rifle is recoiling hard, then I need order a heavier buffer. Okay thank you.

[Quentin]

It's not so much recoil but a perception that the action is slamming back too fast. Something that you feel when firing carbine length gas then a midlength. It's almost a certainty that a 16" barrel, carbine gas and SA carrier needs more weight than the standard carbine buffer. Probably an H2 and maybe even an H3.

Some people upgrade to the H3 knowing that it has 3 tungsten weights (3T+0S) and their standard buffer has 3 lighter steel weights (0T+3S). If the H3 is too heavy they know they can swap a steel for a tungsten weight and end up with an H2 (2T+1S weight) and an H (1T+2S). You just have to press out the roll pin holding the plastic bumper to get to the internal weights.

[kytowboater]

Thank you a bunch q. Your the man.