I only have a few picatinny-style slots on top of my .25 cal air rifle. Can someone tell me what the measurement is: center to center on the two bolts
1505718
Each clamp pad is 1 3/8 inches long. The screw center in the clamp is 11/16 of an inch. Butting the 2 pad ends together gives you a total length of 2 3/4 inches long. With pad clamps butted together, center to center of holding screws is 1 3/8 inches. Hope this helps.
1558839
Hello Jim, I am pretty sure you can use 20 or 22" bolts, there is room on my crossbow. I would make sure if you are using this for hunting, you practice with the same size bolt and the same weight tips. I am very pleased with my Buck Commander. It assembled very easily, after I watched a couple youtube videos. I am shooting the 20" and they are working fine on the targets. Waiting for next hunting season. They are super fast and after sighted in, they tack the bolts. Do not use more than three at a time, you don't want to Robin Hood the bolt. Good Luck, Bill
610819
One is called Weaver and the other Picatinny (MIL-STD-1913). These two rails, in many cases, can be used interchangeably.The main differences between the Weaver and the Picatinny rails are the size of the cross slots and the slot spacing. Weaver rails have a slot width of 0.180�� (4.572 mm), but are not necessarily consistent in the spacing of slot centers. The Picatinny rail has a slot width of 0.206�� (5.232 mm) and the spacing of slot centers is always 0.394�� (10.008 mm). Because of this, Weaver devices will fit on Picatinny rails, but Picatinny devices will not always fit on Weaver rails.That said I believe that the Burris will work since it will only use one slot on the rail. One is called Weaver and the other Picatinny (MIL-STD-1913). These two rails, in many cases, can be used interchangeably.The main differences between the Weaver and the Picatinny rails are the size of the cross slots and the slot spacing. Weaver rails have a slot width of 0.180�� (4.572 mm), but are not necessarily consistent in the spacing of slot centers. The Picatinny rail has a slot width of 0.206�� (5.232 mm) and the spacing of slot centers is always 0.394�� (10.008 mm). Because of this, Weaver devices will fit on Picatinny rails, but Picatinny devices will not always fit... » Read More One is called Weaver and the other Picatinny (MIL-STD-1913). These two rails, in many cases, can be used interchangeably.The main differences between the Weaver and the Picatinny rails are the size of the cross slots and the slot spacing. Weaver rails have a slot width of 0.180�� (4.572 mm), but are not necessarily consistent in the spacing of slot centers. The Picatinny rail has a slot width of 0.206�� (5.232 mm) and the spacing of slot centers is always 0.394�� (10.008 mm). Because of this, Weaver devices will fit on Picatinny rails, but Picatinny devices will not always fit on Weaver rails.That said I believe that the Burris will work since it will only use one slot on the rail. « Show Less
1652267
That means PERFECTLY seating the mount onto your firearm. Sometimes when you order third-party equipment it doesn't fit properly. In which case you would have to use JB Weld or something to create a perfect fit. For absolute accuracy a scope must be placed top dead center on to a firearm.
1271531
If I could make a suggestion, I purchased mine for an AR10 and found I needed more height because of the bolt, so I also purchased a 1/2" rail extension and it worked great!
384957
I just measured mine, space between holes is about 1 1/16 of an inch although there is a variance of about 1/32. The holes are about 2 1/8 inches measured center to center. I bought a couple generic accessories (dip bars, plate holders) from different companies and those worked fine.
621847
What are the differences between the "Picatinny" and the "Weaver" systems? The profile of the two systems is virtually identical. Depending on the quality of the machining done by the manufacturer, the two systems should be indistinguishable from the profile. The key difference lies in the placement of the recoil grooves and with width of the grooves. MIL-STD-1913 (Picatinny) grooves are .206" wide and have a center-to-center width of .394". The placement of these grooves has to be consistent in order for it to be a true "Picatinny" MIL-STD system. Weaver systems have a .180" width of recoil groove and are not necessarily consistent in a center-to-center measurement from one groove to the next. In many instances, a Weaver system has a specific application that it is machined for, so interchangeability is not necessarily an issue. A MIL-STD-1913 system must adhere to the specifications listed above in order for it to be considered MIL-STD, since the military desires uniformity in the recoil grooves to allow for different systems to be mounted on the weapon with no concern for compatibility. Now, what does this mean to you? Boiled down, it means that accessories designed for a Weaver system will, in most cases, fit on a "Picatinny" system. The reverse, however, is probably not the case. Due to the larger recoil groove, "Picatinny" accessories will not fit a Weaver system. There are, of course, exceptions to every rule, but for a good rule-of-thumb, "Picatinny" won't fit Weaver, but Weaver will fit "Picatinny". Robert, saw that some said that it didn't work for them. I have this mounted on the rail of a Century Arms AK-74 with no issue.
394777
Hi,"5" is the number of bolts. "4.5" is the diameter of the bolt pattern in inches. This is hard to measure because it's a 5 bolt pattern. I just measured from center to center of the bolt holes (two holes next to each other) and it's approximately 2 11/16". Hope that helps.Skip
1495774
Good question, I bought them wondering the same thing. I have my rear sights as far back as I can under the EOTECH Magnifyer. It doesn't bother me, when folded back, its about the same width as the picatinny rail. Some charging handles are larger than others, I have mine on a HK MR 556 which is the normal size, its fine. All in all, I love them, they work good and I would buy them again. If i was in a war situation and need to lock in load quickly, I might give the sights a little more thought... Being the casual shooter that I am, love them, work great!
662983
The sling stud is not in the way on my rifle. i think each rifle is different for sling stud location. However, the stud is usually at end of stock or closer to upper opposite end.Either way, simply slide it on and reconnect sling. I love mine. Good luck
1121368
I'm not 100% sure but I think these are the measurements for my screws... #6 10mm long flat head screws with 40 threads per inch. Note: Home depot probably won't have these so try a Fastenals or nuts/bolts specialty hardware store.Proceed with caution as I used stainless steel screws (so they wouldn't strip, rust, etc...) with my rail; I tightened them enough so that they hold the rail in with no wobble but I wouldn't go crazy and over tighten them as they may damage the receiver's threads. This rail was actually made for H&R; rifles and not the pardner pump shotgun (same hole spacing, different rail thickness) In any case, I've got 50 rounds through it and my red dot is still tight. I'm not 100% sure but I think these are the measurements for my screws... #6 10mm long flat head screws with 40 threads per inch. Note: Home depot probably won't have these so try a Fastenals or nuts/bolts specialty hardware store.Proceed with caution as I used stainless steel screws (so they wouldn't strip, rust, etc...) with my rail; I tightened them enough so that they hold the rail in with no wobble but I wouldn't go crazy and over tighten them as they may damage the receiver's threads. This rail was actually made for H&R; rifles and not the pardner pump shotgun (same hole... » Read More I'm not 100% sure but I think these are the measurements for my screws... #6 10mm long flat head screws with 40 threads per inch. Note: Home depot probably won't have these so try a Fastenals or nuts/bolts specialty hardware store.Proceed with caution as I used stainless steel screws (so they wouldn't strip, rust, etc...) with my rail; I tightened them enough so that they hold the rail in with no wobble but I wouldn't go crazy and over tighten them as they may damage the receiver's threads. This rail was actually made for H&R; rifles and not the pardner pump shotgun (same hole spacing, different rail thickness) In any case, I've got 50 rounds through it and my red dot is still tight. « Show Less
1279191
The mount is two piece, the outside width is 1"Plan on three slots on picatinny rail it wont cover the outer slots but will make them unusable for other mounts. If you have 1" , it should work.
787361
Hello David, atxguy here....If you were asking by stating "rail" the bottom mount surface of the unit, ie, the picatinny rail, that measurement is +/-.906" by my using my digital caliper, you can convert to closest fraction if you need and do not have access to a caliper.Hope this helps, if I misunderstood your question respond and I will do again......
1136766
The one that I bought was 1 1/4" long. Also, the bottom piece is aluminum and the thin top piece is steel, not aluminum as advertised. I bought mine for a bipod mount and it worked perfectly, stayed on tight. I decided to go with a quad rail and took it off. I'll send you the one I have for free if you can find a way to get me your address without pissing off Amazon.
1566641
Yes, it's only 4 slots. I am currently using it with a BSA Global Sportsman Tactical Combat. (http://www.amazon.com/Sportsman-Tactical-Military-Brightness-Weaver-Picatinny/dp/B00ARM39M2/ref=sr_1_2?s=sporting-goods&ie;=UTF8&qid;=1385049685&sr;=1-2&keywords;=bsa+red+dot+sight) It's a 5 slot as well and holds in place with no trouble. The NcStar is pretty sturdy. This may work for you, I haven't had any trouble yet.
648195
When fitted onto a picatinny or weaver rail, the mount is 6 mounting slots long. However, the mount uses tension between two pieces to lock onto the rail. It does not require all the presence of all six slots, and can firmly clamp onto as little as 3 or 4. I hope this helps.
1896161
Its a pin fastener, not screw and its mil-spec for AR15/M4. There is no size variance on the length. If you shoot with gloves, this will work on all @AR14/M4 mil-spec uppers with replacable trigger guards.