Go with the proper profile and save yourself some grief. Your favorite AR trigger might not be the best choice to interface with a 9mm bolt. Trigger selection on a 9mm AR is critical to good performance. Please see the stand alone review and a Giveaway for that HERE. For the trigger we selected the Advanced Combat Trigger (ACT) from ALG Defense. The lower, while it contains the key 9mm components, is still technically a “stripped” lower so you’ll need a lower parts kit to finish it off, we picked one up without a trigger to save some cash. I whipped out the credit card and fired off an order, less than a week later my rail was on the porch and I was ready finish the build. This was my fault and luckily I have a very sweet 300blk out build that I was looking to upgrade, so you’ll see that rail in an upcoming video.Īs I went about finding a new rail to use on this build I found myself back at the QC10 website, they have specifically cut rails to match perfectly with their barrel lengths. Initially my plan was to use Geiselle MK8 rail in DDC but I completely forgot that the Side Charging (and forged) uppers don’t usually play well with anti rotation tabs. The Upper will be the easiest to complete, you’ll only need a rail and corresponding barrel nut.
To Complete the build you’ll need to pick up the most common items people like to customize such as the Brace (or stock if building an SBR), grip, trigger and rail. With these key components as your base you’ll be eliminating the majority of issues most 9mm builds face by getting parts designed not just to work with 9mm but designed and fitted to work together in one package. It includes the GSF Stripped Lower (w/ needed parts for 9mm Glock mag use) and Side Charging Upper receiver, 1/2x28mm threaded barrel (5.5″, 7.5″, 10.5″ or 16″), G9 Bolt assembly and Adjustable Buffer Kit all of which were made and designed for 9mm use, not modified. They are extending 13C Subscribers with 15% offat:įor this build we started with the Side Charging Glock Small Frame (GSF) Builders Kit from QC10. If you really want one to run, you should look into dedicated 9mm receivers and corresponding parts. The standard AR-15 wasn’t meant to run a short 9mm cartridge, nor function as a blow back firearm. You’re going to have to precisely tune it if you want it run properly but if you use the correct parts up front there will be minimal, if any, tweaking to do on the back end.
Think of it this way, the 16″ 5.56 AR is like a Honda but the 7.5″ 7.62x51mm or custom 9mm build you plan on running suppressed is like a Ferrari- you shouldn’t just start grabbing any part off the shelf and expect it to run well. Gas length system really becomes an issue, buffer weights, adjustable gas blocks, what magazines will work in the lower I’ve chosen, wait, what type receiver am I using? Once you start changing up calibers and barrel lengths things can start to get dicey. You’ll have a ton of different options but for the most part everything is fairly plug and play. Building, or more precisely assembling, a 16″ AR15 in the common 5.56 caliber and with all ‘mil-spec’ parts is relatively easy and fairly straight forward. They’ve been called “legos for adults” and for good reason, the now ubiquitous AR15 is one of the easiest things to build you’ll come across in the firearms arena. Build it right, from the start, and you’ve got nothing to worry about.
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