SIG 751 SAPR

[JoshNC]

I believe the 751 uses a threaded muzzle. Will check on Rotex V; should be compatible.

[45C]

Flash Hider on the 751 is the same style as the one on the L.E. 551's. Flash Hider and barrel are a one piece integrated forging with threads on the inside of the Flash Hider for the suppressor.

[45C]

Suppressor's: http://www.swissarms.ch/en/equipment.html

[call_me_ski]

Seems that the ROTEX V will fit. Seeing that it is designed to fit a normal a2 birdcage; I wonder if the Griffin 30SD would fit as well.

[Firefly]

Aside from the nicky neat factor....
do these offer accuracy comparable to/greater than a SCAR or SR25?

SAN makes awesome stuff but it is kind of a commitment and I am unaware of anyone who uses these things.

Any and all info appreciated

[call_me_ski]

I am curious what accuracy I would be able to get from mine when it arrives. I am not expecting it to shoot as well as a high end ar10 variant. It all likelihood the lack of a free floated barrel will hurt it in this regard.

As far as professional users, I doubt you will find any outside of some Swiss LE units. If for no other reason, the price would likely be prohibitive vis-à-vis other options.

As far as the appeal of these rifles, this is how I explained it in the past:

I admire the sig 550 series guns. They have an attention to detail in craftsmanship I have not found in any other rifle in the same class. However they do so without truly bring anything to the table over rifles at a third of the price. They are nostalgic the same way a 1911 is. They are not what is late and great but they still work as intended just fine as long as you understand what you are getting.

Chances are if you have to ask...

[SteyrAUG]

I am curious what accuracy I would be able to get from mine when it arrives. I am not expecting it to shoot as well as a high end ar10 variant. It all likelihood the lack of a free floated barrel will hurt it in this regard.

As far as professional users, I doubt you will find any outside of some Swiss LE units. If for no other reason, the price would likely be prohibitive vis-à-vis other options.

As far as the appeal of these rifles, this is how I explained it in the past:

I admire the sig 550 series guns. They have an attention to detail in craftsmanship I have not found in any other rifle in the same class. However they do so without truly bring anything to the table over rifles at a third of the price. They are nostalgic the same way a 1911 is. They are not what is late and great but they still work as intended just fine as long as you understand what you are getting.

Chances are if you have to ask...

Honestly the 550 is the only piston gun I've ever shot that produced accuracy comparable to the AR and their ability to run in less than optimal conditions are legendary. But I wouldn't expect much in terms of accuracy from a 14" barrel no matter who made it. Colt, HK or SIG it's still a 14" barrel shooting .308 which sacrifices quite a bit of potential.

If they ever come in with a 16" or 18" barrel I'd be all over it.

[call_me_ski]

Honestly the 550 is the only piston gun I've ever shot that produced accuracy comparable to the AR and their ability to run in less than optimal conditions are legendary. But I wouldn't expect much in terms of accuracy from a 14" barrel no matter who made it. Colt, HK or SIG it's still a 14" barrel shooting .308 which sacrifices quite a bit of potential.

If they ever come in with a 16" or 18" barrel I'd be all over it.

There is a rather good discussion ongoing here:
https://www.m4carbine.net/showthread...-why-not/page3

The shorter barrel should not in itself reduce accuracy. You will loose velocity but with newer loads it may not be as much as you thought it might be. If I'm not mistaken the 751 has a 1-10 twist vs the 1-12 found in the SCAR so that should help with the shorter barrel.

[RetroRevolver77]

There is a rather good discussion ongoing here:
https://www.m4carbine.net/showthread...-why-not/page3

The shorter barrel should not in itself reduce accuracy. You will loose velocity but with newer loads it may not be as much as you thought it might be. If I'm not mistaken the 751 has a 1-10 twist vs the 1-12 found in the SCAR so that should help with the shorter barrel.

Germans use a 1/10 twist in the G3K with a 12.4" barrel. Necessary for stabilizing rounds at distance out of the shorter barrel length but many people chop down the full sized G3's with the original 1/12 twist barrels and report decent accuracy out distances of 500 meters. I had two G3K's and overall I feel that particular barrel length is quite handy for a .308 rifle.

[Benito]

I had a 14.3" SAN PE90 (5.56) or whatever the hell they call them, back in the day. It was a 1:7 twist.
Goddamn outstanding. It was a long time ago, so I don't really recall what the group sizes I got were.

What I do remember liking was:
- it ran 100% reliably with every conceivable type of ammo I shot through it (everything from bargain bin crap, surplus, match loads, you name it)
- it was high quality (well thought out overall design, very solid folding stock mechanism, etc).
- excellent and bombproof diopter iron sights
- the rock and lock mags were very good. No question as to whether they were inserted properly or not. No malfunctions of any kind

The downsides were:
- ergos weren't as slick as the AR (e.g. selector required moving the hand, as my thumb could not reach it from the firing grip),
- it was a bit heavier than an AR of similar length and barrel profile
- very little aftermarket support (and factory parts were $$$$$$$$$$$$)
- the 1913 optics base rail sat noticeably higher than the stock, so if you wanted to mount an optic, you either needed a cheek riser or to swap out the stock for an inline AR buffer tube and AR stock (but this meant you couldn't use the iron sights properly). Note that a factory cheek riser from SAN was around $200 at the time. Knock-offs could be had for $50.
- if you wanted to reload your brass (I don't reload) it might be a pain because it mangles spent cases due to very robust ejection
- the mags, in addition to being expensive (see above) had really annoying tabs on the side so you could couple them together. Perhaps it's a subjective thing, but since I don't usually couple mags together, it made inserting and drawing them in/out of pouches a real pain in the neck. (I see that SAN has done away with the tab nonsense on the 751 mags - excellent choice).

Pros and cons, but definitely a very robust gun. No question.