DonVito007

Thanks for you range report. Did tou notice any difference in gun bouncing when shooting different ammo? I mean you do have short stroke with 5 steel, which I am thinking to get to shoot 115 and 124 S&B ammo, but also do have a great source of remanufactured ammo (147) for a very good price...which I am using in my CZ-75 TS Orange pistol

OK, good to know that your set up is flawless with both lighter and stronger ammo. I see...and does that magwell make any real diffence in mag exchange or is is just an aesthetical touch;-)?

What a nice pic! You do have “normal” comp on both if I’m not mistaken, right? What loads do you shoot? Would you recommend that magwell you do have? And how about the stock...is that the JP minimalist one?

Yeah, would also like to know how the dot moves with a shorter barrel. And what is the issue with safety please?

Nice one:-) When it comes to buffer...what portion off steel and tungsten do you have please? I can’t find it on the build list...

Your comp is titanium one if I’m not mistakem...so good to know that. And what loads are you shooting please?

Is that a velcro on the stock? And if so, why? It is Holosun 510C if I’m not mistakem...isn’t it a bit high in contrast with the stock?

Thanks fot sharing, man! My take is 10” barrel with M-Lok handguard and a basic upper, but color-wise the same combo probably...black with blue. What comp did you get? And what trigger? And how is that stock?

Thanks for sharing. Seems to me my preference is to be a good one;-)

I hope I’ll have time to write JP tomorrow...gonna mention that as well. Suppressors aren’t legal in my country, so this won’t work for me...unfortunately. Thanks for your opinion on barrel length. This vertical comp is an interesting stuff for sure...so your initial experience says it helps to control red dot/muzzle bouncing?

Thank you, sir:-) Works fine, the only problem is they don’t offer an option to choose 9.25” M-Lok handguard with 10,5” barrel at all, so it seems to me I need to contact JP anyway:-(

Vertical comp should do what? Less gun/red dot bouncing?

Nope, I´m not a US resident and there is no minimum barrel requirement in my country. So, thanks for this comment The point is there is no option of 10,5” barrel in JP rifle builder. It is possible if I try to build upper assembly though. And when I opt for 10,5” barrel and 9,25” M-Lok handguard (7,5” is too short), it means 0.6 lbs less and brings me below 6 lbs in total which would be great! I´d just have to contact JP people and ask how to proceed if I want to build the whole rifle with such barrel length. Just not sure about the ballistic and especially gun bouncing when shooting with 10,5” versus 14,5”/16” barrel length. Any experiences please?

Well, 7 lbs is really heavy for me. I´d prefer 6 lbs max. Is that Tech Well mag well really a must? Speaking of trigger…does the lower accept any AR trigger?

Agree, stainless bolt and barrel. Will go for the same charging handle. And thanks for that ambi mag release – will double check and try to get it as well.

Yes, seems to me they are changing the options constantly. Hmmm, will check the ambi stuff for sure. Well, I am going to be shooting mostly factory 115 and 124, so I guess I need to talk to my dealer to decide the steel/tungsten ratio is scs short stroke. Will also discuss the trigger with him. OK, great, so if I go for 14,5 barrel, I can order Smoke Composites handguard with no worries.

Yes, a lot of options. The problem is I almost have no chance to try this rifle before buying (except for getting my hands on one in the store) as JPs are not that popular in my country. The main reason is price – they are simply too expensive for most of the shooters due all the fees to be paid for US goods import. So I basically don´t know what to opt for when building one. And that's why I am happy for any personal preferences and experiences. 14.5 barrel for sure. I don´t believe shorter or longer makes much sense to be honest. Stainless steel barrel and compensator is what I'm looking for too. And how about titanium compensator, is it worth extra money, what do you think? It's definitely lighter than stainless steel, but any other (dis)advantages? Stainless bolt then, thanks for a recommendation. I was also considering the extended mag release, so thanks for confirmation. Is it ambidextrous by the way? I´m right handed, but my left eye is dominant, so I shoot rifles and shotguns from my left shoulder, using my left hand to pull the trigger etc. Well, ADD weight to the gun…why not…but definitely not to the front of the gun from my point of view. So, I´m with you in this. And, plus 9mm Luger is sort of kicky no matter how heavy the front of the gun is. I believe that if for instance a short stroke system is chosen etc. the GMR-15 recoil can be reduced significantly. Not as much as in case of .223 Rem, but enough to make shooting fun. Any recommendation on what to choose in JP rifle builder to achieve a minimal recoil please? Smoke Composites handguard – yes, checking their webpage I can see it´s either version without top rail (outside diameter 1,69”) or version with top rail (outside diameter not mentioned on the webpage). I´d go for the version without top rail as I don´t think I need it for anything. Do you also use any Magpul M-Lok adapters on your handguard (If they are compatible at all)? OK, so I´ll ask JP for a barrel nut tool when ordering, thanks for this. And does Smoke Composites handguard come with all the stuff (bolts, screws or what is necessary) necessary for its installation to a rifle upper? And are any non-standard tools needed for this installation, please? Speaking of trigger, I did this preliminary configuration in rifle builder: Trigger Style: JPFC-M Modular Trigger Trigger Module w/ Interchangeable Shoe Approximate Weight: 0.2 lbs $112 Trigger Shoe: Armageddon Gear Revolution Trigger $0 Trigger Weight: Competition/Recreation Trigger JP Modular Trigger with 3 - 3.5 lb. pull $0 Is it the same as yours? And what kind of trigger shore do you have? Curved, flat or that Armageddon one?

Hi all, I’d like to ask the JP GMR-15 owners a couple of questions. Preferably the ones who have upgraded their weapons with carbon fiber handguard. I’m in the process of choosing my first PCC a decided to go for JP as I want to shoot and not to worry about anything. Sig MPX was an option as well but since it is basically unavailable in my country (and the same goes for any spare parts should I need some), JP is the only option now. I shoot for fun, but pondering to try some competitions in the future. The first question is whether to go for the one from ready rifles or to use JP rifle builder? My JP dealer does have this one in stock: https://www.jprifles.com/buy.php?item=RR-GMR15APC If go for a different one, I'll have to wait a couple of months (I live overseas). But I have no problem to do so as I don't want to hurry anything. Generally, I do like lightweight and low recoil rifles with a light (sport) triggers with a short reset, so I prefer my GMR to be the same. Based on your experiences - is it possible to achieve better recoil or get a lighter trigger by choosing a different components in JP rifle builder? Speaking of weight: Is it worth to go for a titanium compensator? I'll definitely go for a non-standard JP handguard as the standard one is heavy for me and its diameter is too big for my small palm & fingers. Since I don't believe thermal dissipator is necessary, I see two options here: 1) JP M-Lok - diameter looks much better, but its weight is only slightly lower - it's still sort of new, not even on many pictures...any experiences with that please? 2) some carbon fiber - Smoke Composites (12") looks the best to me (did some market check and people on this forum recommend it as well) - its diameter is fine as well and weight is hard to believe (5.37 oz vs 13 oz for the standard JP one), but since my JP dealer is focused on Lancer carbon products, he is somehow reluctant to provide any support related to Smoke Composites handguard, so I'm wondering how complicated is to change the handguard at home (I'm not that skilled in such stuff to be honest), if any non-standard tools are needed (both for removing JP handguard and installing the Smoke ones) and mostly whether is comes with all the stuff necessary for mounting to the weapon? Is the Smoke Composites handguard sturdy enough, please? Any wobbling when shooting? And how about heat conduction when shooting more rounds in a short time? Any other reasons to go to a rifle builder (except for stuff like different trigger, safety and mag release color) in comparison to a ready rifle, please?