2006年8月25日 · I had RDTS convert a 2nd HK91 to a 51IMP SBR for me. Gun is excellent ( I do not touch clones). Read all the material I could find before making decision on who.

2011年12月18日 · I am thinking about getting a PTR-91 PDW and SBR'ing it with a H&K Retractable stock and was intrested if anyone had done this yet and how reliable the pdw's are. I have a PTR-91F that is dead reliable with everything that I feed it including South African and Malaysian ammo, so i am hopeing that the PDW's are just as reliable.

2022年7月2日 · Over the last year, I went back and forth with the decision to SBR two SP5 pistols. I learned a few things along the way and wanted to pass the lessons... in this thread in this sub-forum in the entire site

2020年9月10日 · The HK-91 system is old, but extraordinarily reliable as a battle rifle. Good ammo would usually shoot about 1-1.25 inches at 100 yards. Williams trigger specialties can do a superb trigger job on those rifles.

2022年8月3日 · I had a G3K SBR built from an HK91 by RDTS. Put a Fleming sear pack on it and it's pretty uncontrollable even with the full stock. Shot it once and ended up selling it few years later.

2022年10月1日 · I have a Springfield that has a different receiver but all the other parts are HK. The brake on it is one of the best I’ve used. It makes the 308 pleasant to shoot in such a light gun.

2021年1月26日 · Brand new HK G3K A2 (.308) SBR freshly built by TSC. Conversion was built from a HK91. Built to G3K specs including grenade launcher ring, tungsten bolt carrier, handguard with bipod, etc.

2018年4月9日 · So far I like the K3P a lot better than the full size PTR for several reasons. The biggest reason is that this pistol is destined to become an SBR. The advantages of this Atlantic Firearms exclusive is that it can accept a standard Hk91 or PTR91 stock if you do your tax stamp NFA paperwork and get approved.

2023年11月9日 · Old school Vollmer HK51 HK-51 HK51A3 sear ready. Pinned and welded barrel extension. Simply SBR it and remove the barrel extension. They don't come much nicer. Buyer can pickup in person in Atlanta or will ship for $50. Shipping is $90 if you require it be sent from an FFL. Check, MO, and some electronic payments accepted.

The backbone of the SP5 is the roller-delayed blowback operating system, which is legendary for its accuracy, reliability, and smooth shooting dynamic. Originally perfected on the Heckler & Koch G3 rifle, it has been used on several other HK firearms still serving today around the world.