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Posted: 10/19/2004 9:27:52 AM EDT
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I am considering an SPR – tending toward a Mod 0 with the PRI rail MSTN SPR 2d down from the top. Any Concerns with the PRI Rail or any concerns with doing a Mod 0 vs. a Mod 1? I hate to say it but I am tneding toward the Mod 1 based on aestetics, however, I do not want to compromise capability and am not wedded to the Mod 0. Purpose is general shooting/plinking at +300 yards. Thank you. |
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For what you are talking about either will serve you pretty dang well. The Mod 1 has less nuts and bolts and is simpler, sleeker, lighter gun because of it. The Mod 0 is heftier and the one thing people seem to like about it is the long, uninterrupted rail on the top. I know thats the one thing which stands out that I like about mine. Other than that I think a lot of it will come down to asthetics. And to be honest, thats what a lot of us are basing our decisions on. Seriously, when you get to this high an end of gear, the quality is there either way you go. |
| The word around here is that Mod0s aren't made anymore, just Mod1s. I checked my Mod1 clone and the rail does flex some. Does it affect how it shoots - not with the scope, which is mounted on the receiver - it may affect the BUIS, but they are just that BUIS, so you make the call whether it affects your needs or not. |
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I went with both (obviously for price reasons, not at the same time). I think the big thing does come down to aesthetics and it is in what you would rather have. I like mine to be as "correct" as possible in terms of what the military is issuing/using, and if you are the same way, it may be easier for you to go with the Mod0 because parts are a little easier to find and it is a hair cheaper. The Mod1 is nice (I built it in 6.8 Rem SPC) but getting your hands on Knights parts is becoming a pain in the ass. Either way, both are very accurate. With handloads through my Mod0 (topped with a Leupy 3.5-10 LR/T) I have been shooting groups on average 3/8" across and less. With the Mod1 (topped with a Leupy MR/T) I havent measured the groups but it also is amazingly accurate and I'll let you know how they measure the next time I get out. |
| I think both will produce the accuracy that you are looking for. Personally I like the look of the Mod 0 better. I have all the parts for my Mod 0 minus the barrel. I'm currently using a Colt 20" as a temporary barrel. Yes the Mod 0 is heavier, but I like the fact that it's more stable. Or at least it feels that way. The only aestetic issue that I have with the Mod 0 is how stubby the standard 18" barrel looks with the Ops Inc suppressor collar all the way up against the PRI front sight. I like the little gap on the Mod 1. It looks a little sleaker. |
That is a fact. The PRI middy tube I had was surprisingly heavy, but add up the big-ass barrel nut and the accessory rails and you have alot of steel there. Plus add the full length top rail (ARMS 38S-EX or something like that) to the whole Mod0 mix and your FF rail system is alot heavier than the Mod 1 KAC rail system by itself. One advantage of the full top rail is an unlimited selection of scopes that can be mounted without eye relief problems. Mounting on the receiver rail only limits scopes to short eye relief styles like the MR/T, unless you want to bridge across the barrel nut. Knowing there is flex in the KAC rail system made me hesitant to do that, but many here have done it without issue. |
No thought on that, as I have no experience with the PRI rail system. I had an M4gery with an ARMS 38S-EX-MOD and it allowed mounting of just about everything, but then along came the SIR and made the ARMS rail obsolete. |
| When I bought mine I preferred Mod0, but the more I think about it the Mod1's advantages are too numerous to discount. The Mod1’s lighter weight and simplicity are certainly an advantage. Especially when it performs exactly the same. None of the differences has any effect on the weapons accuracy or reliability. |
What he said, but I still think the Mod0 looks cooler 
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The Mod1 design is just pain simple. Using the KAC FF RAS over the PRI carbon fiber forend and ARMS #38 rail combo removes both weight and unneeded fasteners. You can also substitute the LaRue, DD, or any other FF rail system and affect nothing in the performance of the weapon. I really do not see any advantage/disadvantage to using the KAC or ARMS bipod mount. They both do there job very well and are ultra reliable. The KAC might save a little more weight, but that’s it. |
What he said too
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Both the mod 0 and 1, are in service. The mod 1 is a little lighter and the mod 0 has less flex out front via one continuous rail from front to back for perfect aignment. Both use the #40 rear folder BUIS, or the KAC 600 meter for the mod-1. Good shootin, Jack |
| I was thinking about getting the PRI forearm on my SPRbine. Two questions. First, is it possible to get one with an aluminum barrel nut rather than a steel one? Second, how big is the weight difference between a rifle length PRI and a KAC (or any other comprable rail system, LaRue, DD, etc.). I'm trying to find a rail system that's steady enough to handle a front sight but light enough where it won't add too much weight over my current setup (free float aluminum tube). Any suggestions? |
There is an aluminum barrel nut available for the PRI. |
| Wes from MSTN had specific weights of the two, wish I knew where I could find them now. I have one of each, well, a good good friend has the Mod1 I have the 0. My Mod 0 is not a true clone and has a few options that make it even HEAVIER still! The weight difference is not dramatic but it is noticable. I'll see if I can come up with specific weights of two perfect clones. |
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PRI tube weights courtesy of PRI: PRI rifle free float fore with all rails, steel nut 1.19Lbs (19.04 oz.) PRI free float forearm with steel nut, no rails .855 lb. (13.68 oz.) PRI rifle free float forearm with aluminum nut, no rails .700 lb. (11.20 oz.) PRI rifle length, all rails and aluminum nut 1.015 lbs. (16.2 oz.) PRI carbine length, all rails and steel nut .95 lbs (15.2 oz) PRI Intermediate forearm with rails 1.010lb. Steel nut(16.2 oz.) PRI Intermediate Forearm with Rails and High strength Aluminum nut .865lb. (13.8 oz.) |
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ScooterP - So yours is similiar to the MSTN Mod ) which I began this string with?MSTN 2d from top How do you like it? |
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