Is CMMG the best 9mm bolt?

When you are building your own? I've heard lots of good things (and a couple bad) about New Frontier's 9mm bolt and it can be had for $60 less.

Doing a Colt style rifle, have most of my parts planned. Already have my dedicated PSA lower assembled.

I really like my Nitrided Spinta blem bolt. Can't tell if it's the bolt or my mags, but it's dragging on a lip of my Creative Products mags.

There are quite a few to choose from these days.

Angstadt Arms: https://angstadtarms.com/product/9mm-bcg/

CMMG: http://www.brownells.com/rifle-parts...9%2bmm%2bLuger

Colt: http://www.brownells.com/rifle-parts...9%2bmm%2bLuger

New Frontier Armory
Kaw Valley Precision
JP Enhanced BCG
http://www.joeboboutfitters.com/9MM_...s_s/163737.htm

Spinta Precision: http://www.spintaprecision.com/9mm-n...er-group-sale/

JSE Surplus: http://www.jsesurplus.com/9MMBoltAss...ompatible.aspx

PSA: http://palmettostatearmory.com/oem-p...up-w-logo.html

Mid State Firearms: http://midstatefirearms.com/9mm-Nitr...olt-9mmbcg.htm

Just to list a few. I'm certain there are more out there.

Something else I thought was worth a mention (as I too am doing a PDW 9mm AR build soon), with PSA it is not uncommon for their products to not be compatible with other manufacturers. I'm going to be using a lower that will be compatible with Glock magazines. It's what I currently love to run and I know they work. It keeps it compatible with my handgun. Best of luck with your build. Probably look at starting mine after the holidays. I just ordered my parts to build my Form 1 suppressor so I gotta save up a bit now.

Can't comment on any other bolts but I am using the CMMG (with Spikes 9mm buffer and Wolf extra power spring) on myQC10 Colt pattern and it seems to be working fine.


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I have a Rock River and a JP bolt.

Both work flawless.

I have a KAK BCG and has run flawless putting 200 rounds thru it so far.

Anyone ever use these guys? I might order something after the new year. I have a QC10 Glock to build.

http://www.kawvalleyprecision.com/pr...vp-9mm-bcg.htm

I have used a CMMG since 2012, no problems at all.

I have a new frontier bolt, I believe it is a hybrid, I am using it with a billet lower that uses Glock mags

In my very limited experience, all AR-9 bolts are equal as long as you choose the correct platform (Ex Glock vs Colt).

I ended up with a Spinta Precision bolt.