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Staff Review: SIGTac CP-4 Rifle Scope


Category: Review
Sept 17
Written by - txshurricane
SIGTac CP-4

In August, we received an assortment of SIG Tac accessories to try and evaluate. Over the next three or four months SIG Addict will offer our impressions of each one, in turn.

First up is the SIGTac CP-4 scope. This overlooked, 4-power rifle scope took a trip with me to a dusty spread near the Texas-Mexico border. It rode atop a sporting AR-15 (not a Sig, I'm sorry to say) as two accomplices and I patrolled for migratory birds and nonnative game. Although the Manufacturer's Suggested Retail Price sits right around $300 US, you can catch this good little optic for under $200 with relative ease.

The first thing I noticed during the unboxing was its weight - it's a bit hefty for its size. I got the impression that it was sturdy (and as you'll see, it didn't disappoint). The second thing I noticed was its terribly particular eye relief requirement - if your eye isn't exactly in the correct spot, you'll lose a lot of view space. I'll admit it: this concerned me a bit.

Because of the touchy eye relief specs, I instinctively mounted the scope as far back as I could. In turn, this set it over my strong hand and I was able to shoot and carry the rifle without ever noticing the added weight. And when I leaned in for a proper cheek weld, I realized that natural placement had made eye relief a non-issue. Thankfully, operating the AR-15's standard charging handle was not affected by having the scope so far back - at least, not for me.

The flip side of mounting so far to the rear is that there is no room for a backup aperture sight behind the scope. But since the CP-4 functions fine without a battery, half the reason for needing backup sights is already negated (the other half being damage to the primary optic). Your mileage may vary.

Going back to the unboxing: the third thing I noticed was the "Made In China" sticker. Yeah, I know - I groaned, too. By now, we've come to accept that Sig Sauer farms out most of their accessory building to iTac Defense and similar entities, which seems to be a hit-or-miss affair.

I can honestly report, though, that no matter where it was manufactured...it was designed well and performed well. I wouldn't go so far as to say that signs of its cheap construction don't exist. For example, the windage and height adjustment knobs are threaded thinly and are subject to cross-threading if you're not careful while twisting the caps back on. Also, the mounting bolts are slightly too long, which impedes the use of a coin or screwdriver to tighten the nuts (alternatively, they are patterned for a wrench, and they come with locking washers). But these weaknesses did not impact its primary function - it is a dream to peer through its anti-reflection lenses and nitrogen-filled cylindrical body. (No, I'm not joking.)

Posted: 1 year 1 week ago by larmax #7264
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The owner's manual provided with the CP4 does not match the reticle in my CP4. My reticle
has four horizontal bars at the bottom. The bar on the far right has a numerical 2 above it, the bar on the far left has a numerical 10. The Sig Tac manual does not show these bars? Anyone know what they mean and how to use them?
Posted: 1 year 1 week ago by larmax #7263
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Thanks
Posted: 1 year 1 week ago by txshurricane #7258
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larmax wrote:
Can you help me with the cp4 reticle? Specifically the horizontal lines at the bottom and what they represent. I like this scope, but it comes with no explanation for the reticle.
Yours didn't?

Here's a link to the PDF version of the owner's manual: sigsauer.com/upFiles/CmsContent/documents/CP4_SIGTacOpticalSight_Instructions.pdf . The last page has a diagram with a key. It takes a little while to get used to, but it works as an excellent rangefinder.
Posted: 1 year 1 week ago by larmax #7254
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Can you help me with the cp4 reticle? Specifically the horizontal lines at the bottom and what they represent. I like this scope, but it comes with no explanation for the reticle.
Posted: 1 year 1 month ago by KennyD #7139
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Thanks.
Posted: 1 year 1 month ago by txshurricane #7138
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KennyD wrote:
Good review. I have a problem with optics and eye relief. Most scopes I have used needed to be real close to the eye (within 3 inches). How close do you have to be on this scope?
The official number is 3.3" - but I find even that to be pushing it.
Posted: 1 year 1 month ago by KennyD #7137
KennyD's Avatar
Good review. I have a problem with optics and eye relief. Most scopes I have used needed to be real close to the eye (within 3 inches). How close do you have to be on this scope?

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