For the past few months, I have been slowly building a MK12 clone….ish. I didn’t want it to be an exact clone to the military rifles, but I wanted something that paid tribute to the rifle and to the NSW (Naval Special Warfare) type rifles. Since the MK12 came out, the technology has increased 10-fold. Better materials, lighter, stronger, you name it, things have improved. So after speaking with Roy over at Brownells, he sent over a few items, and respectively each item will be reviewed.

For the buffer system I chose the Primary Weapons Systems (PWS) enhanced buffer tube with ratcheting castle nut and endplate. I chose this for several reasons and the features. It weighs 1 ounce less than a milspec tube, fluted buffer tube, drain holes and for the castle nut and endplate. Weight is crucial for me, as having a bad back, toting rifles for a long distance tends to hurt. Ounces equal pounds, pounds equal pain.

The buffer tube as mentioned has fluting along the body which helps with clearing debris from the stock and buffer tube, which can be an issue in desert or sandy environments. Along with the fluting you have decent sized drain holes, which living in Florida where it rains almost daily is important to me if I shoot in all weather conditions. Also having the fluting and drain holes in a saltwater environment is very crucial as salt water will tear up a lot of stuff. The fast it gets drained the better to prevent corrosion.

My favorite part of the kit is the ratcheting endplate and castle nut design. This gives you the strength of a staked castle nut without staking it. This is a huge benefit since normally once you stake a castle nut, the endplate will have to be replaced if you have to remove the buffer assembly. The one thing I noticed with the PWS endplate and castle nut VS milspec is that even when the castle nut isn’t in the final torqued position, it is nearly impossible to turn by hand, thanks to the ratchet system. Milspec parts once broken free spin easily by hand, and this means the PWS is more secure even if the castle nut backs off slightly.

Now, to the price, this is roughly double the price for a full buffer assembly, but it does not come with a buffer or spring. I am always budget minded and would have never purchased this kit prior because of the price. After lots of use and experience with it, it is by far the best option for any build. Stack on a Geissele braided buffer spring and buffer and you will have the best buffer assembly you can get.


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