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Frankengun Friday Begins: PWS EBT Mod2

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This is the beginning of a new series: Frankengun Friday (F/F). 

I recently received a Primary Weapons System Enhanced Buffer Tube Mod 2 in the mail and thought to myself…

Self, you've been wanting one of these for a while now — what are you going to do with it?”

As it turns out, the answer actually took the form of a well-mannered and patriotic young man, a friend of the family, sitting in my office while I opened the package from PWS. He was telling me about a Bullet for My Valentine* concert he'd just attended, complaining about his homework and asking if I'd be free to take him back out to the range any time soon.

“Perfect,” thought I. “I'll build him a Frankengun.”

So that's what we're going to do — but after the starting piece (this EBT Mod 2) we're going to let the readers help us determine what parts and manufacturers to use for the rest of the build. Beginning next Friday, we'll pick one of Frankengun's pieces (a lower receiver, the trigger group, whatever) and let you tell us in the comments what brands we should consider.


Today we'll tell you about the PWS EBT M2. Afterward, we'll need you to tell us which lower receiver we need to use. There are many fine companies out there and we want to know not only what you like, but why you like it.

Don't forget — tell us in the comments which manufacturer you prefer for the lower receiver. We'll vote next Friday.


It's hard to get worked up over a buffer tube, but…no staking. You gotta like that.


The PWS Enhanced Buffer Tube Mod 2 is perhaps most importantly a ratchet-lock design, eliminating any need to stake the castle nut and providing a solid lockup without affixing it in such a way that you don't have to put much effort into removing it again (or running the risk of drama) if you become so inclined. It features an anti-tilt lip intended to give piston guns a longer lifespan with better reliability, doing so by allowing the carrier to start in the buffer tube rather than transitioning into the tube on extraction. It provides for six stock positions, has drainage ports and is designed so the central QD sling swivel mount will allow for a neutral position with multiple sling configurations (a nice touch, that).


The PWS EBT Mod2 is extruded from 7075 with a mil-spec type III anodized finish for corrosion resistance. The MSRP is $104.95. You'll be able to purchase the end plate and ratchet lock nut separate for about 30 bucks.


Watch the video. Marvel at how the narrator sounds like Chuck Norris.

You can find Primary Weapons online here, on Facebook at /primaryweapons and on Instagram @primaryweapons. You can also hit 'em on Twitter (@primaryweapons) or subscribe to their YouTube channel.


*I'd never heard of these guys before but I like the name.

Don't forget — tell us in the comments which manufacturer you prefer for the lower receiver. We'll vote next Friday.

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