Ptr 91

[Moose242]

I am really looking at a new 308 rifle, and I think that the PTR series of rifles may fit the bill. I have always loved roller delayed blowback guns, and I know that the g3 series have proven themselves time and time again.

Anyways, are these good copies of the g3, or just a slight improvement over century CETMEs? Either way, their advertising is impressive-

[ThreeFingerPete]

Rifle looks good, but those videos suck.

[CJ]

Excellent weapons. My G3 shot a .79" group with a red dot today at 100 yards. Never jam, always work. Just very heavy.

[Moose242]

Excellent weapons. My G3 shot a .79" group with a red dot today at 100 yards. Never jam, always work. Just very heavy.

Have you heard anything specific about the PTR company? It looks like they tool up their own stuff rather than rely on parts kits like Century (which tickles my fancy).

[CJ]

Have you heard anything specific about the PTR company? It looks like they tool up their own stuff rather than rely on parts kits like Century (which tickles my fancy).

very good rifles. Avoid the cast receivers. Stamped is the way to go.

[Moose242]

very good rifles. Avoid the cast receivers. Stamped is the way to go.

Sweet. Are all PTR receivers stamped?

Also, they make a pistol variant that I am sure is a hell of a little fireballer-

[txsr20de]

The PTRs use a stamped receiver, just like the original HK.

Before I bought my LMT, I came REALLY close to buying a PTR. I did a lot of research, and for the most part, people seem to be very happy with them. You will find the occasional HK nutrider who insist that anything other than an original HK-91 is trash, but they seem to be in the minority.

Supposedly, all of PTR's tooling is actually genuine HK that they were able to purchase from them second hand. The guns are said to be pretty damn close to 100% identical to the real deal.

I do remember reading something about people having some problems with the metallurgy of the PTR bolt carrier, leading to premature failure, or something along those lines. I believe that PTR was quick to address the issue for them, and everything I have heard of their customer service has been positive.

I wouldn't think that they should be compared to the Century guns in quality, all signs point to them being far superior. I know that CJ has had some good experience with the CETMEs, but my only experience was with a particularly bad example that misfed every 3rd round, then cut the shit out of my finger while I was trying to clear one of the jams.

I say go for it.

[CJ]

Ive built several g3's. I myself would tell you to build one with original hk parts. Checkout robertrtg.com and see what I mean.

[txsr20de]

Ive built several g3's. I myself would tell you to build one with original hk parts. Checkout robertrtg.com and see what I mean.

What is the ballpark cost of everything needed for a build?

[CJ]

What is the ballpark cost of everything needed for a build?

Depends if you use a surplus or new barrel. Between $600-800 depending on parts. On the Revell scale, and AR15 is a skill level 1 - snap together. A G3 would be a skill level 3 - some welding required.

[bottlerocket]

Anyways, are these good copies of the g3, or just a slight improvement over century CETMEs?

Found this over on TheHighRoad:

Rear sight: CETME sports a flip type while HK has a rotary elevation adjustment with windage adj. as well.

Front sight triple frame: CETME is elevation adjustable for zeroing while the HKs is a fixed blade.

Various cosmetic differences between the two: Stock and forend set is completely different( multiple HK variations)

Fire control box internals have slightly different components, bolt, carrier, trunnion all have minor differences.

You finding comparison photos of the internals would be easier than me typing them all out. RTG parts has a page on the interchangeability of the two.

Moreover, the CETMEs most of us know today were very crudly assembled by Century arms. They are made with a low quality reciever and well used parts kits. JLD builds new HK91 copies, on machinery they purchased from FMP in Portugal, which was an original contractor for HK. While not an HK, JLD is by far the best copy of a roller locked delayed blowback rifle on the market.

[Moose242]

Depends if you use a surplus or new barrel. Between $600-800 depending on parts. On the Revell scale, and AR15 is a skill level 1 - snap together. A G3 would be a skill level 3 - some welding required.

I have been looking around this morning, and it doesn't look like anything I can't handle.

Do you have a flat bending jig? If not, I would love to go in with someone on one if anyone would be interested in building a g3, HK93, or mp5 clone. I have been crunching the numbers on building an Mp5 clone from a flat and it looks like I may just do that. I have about 5 magazines for an mp5, but no gun that uses them... I guess that gives me an excuse to start a build!

[CJ]

I have been looking around this morning, and it doesn't look like anything I can't handle.

Do you have a flat bending jig? If not, I would love to go in with someone on one if anyone would be interested in building a g3, HK93, or mp5 clone. I have been crunching the numbers on building an Mp5 clone from a flat and it looks like I may just do that. I have about 5 magazines for an mp5, but no gun that uses them... I guess that gives me an excuse to start a build!

I just use a pipe and some clamps, always worked for me. But if you can find a jig for a decent price I'll build a few more. I use HK stamped and marked flats. I have built one on a Century flat too that I had laying around. As long as the trunion is installed and head spaced correctly the rifle is foolproof.

[bulldog896]

Got a ? for ya This is one of the few I've never built I have a trade offer from a guy on an older Int Ord import FMP receiver with cocking tube and trunion welded in already and the rear sight base attached

question is how hard is the barrel to set headspace on? I have a g3 kit with a US barrel I was thinking about cutting back so the break was on at the FSB tho this guy may have a FMP barrel at which point I will have a mostly FMP gun since the kit has gree stocks.

Anyhow any insight

[CJ]

Got a ? for ya This is one of the few I've never built I have a trade offer from a guy on an older Int Ord import FMP receiver with cocking tube and trunion welded in already and the rear sight base attached

question is how hard is the barrel to set headspace on? I have a g3 kit with a US barrel I was thinking about cutting back so the break was on at the FSB tho this guy may have a FMP barrel at which point I will have a mostly FMP gun since the kit has gree stocks.

Anyhow any insight

It's not bad at all. You just need a head space gauge to make sure you have it set correctly. Basically you seat the barrel in until it is extended out .030" from the chamber face in the trunion. It is also somewhat forgiving as well. Minor adjustments can be made with different roller sizes, up to .030" can be adjusted to fine tune it.


this will answer your questions:



this basically shows you how the roller delaying blowback operates, and mid video he shows you how to adjust for headspace variances and how it works.

Alex: here is a jig in action:



I like all the fancy mandrels he has for the finite work. I just use an old HK bolt and beat the shit out of it until it does what I want. For my PSG-1 build I think I need one of these to make sure I have the receiver perfect. And I'll also be welding on support rails.