Hello all,
I recently bought a used XCR-L in the high 3,000 serial number range that looked brand new. This rifle is the third XCR I've owned over the past five years. The rifle has mostly Gen 2 upper features, but mostly Gen 1 lower features (it does have the integral trigger guard).
It came with a lightweight 1/9 16" barrel without any modifications.
It came with the factory MI flip sights.
The Gen 1 trigger sucks.
Last night I took the XCR and my brand new Sig MCX (Gen 1) to the range for the first time. I had added MagPul PRO flip sights to the MCX prior to the range trip.
It took about 15rds to get the Sig zero'd at 50 yards (low 2.5" inches) and another 9rds to get it zero'd at 100 yards.
I fired 90rds through the XCR and could never get it zero'd. I bottomed out the front sight post, and the rifle is still hitting 8" low at 50, and off of 8.5x11 paper at 100 yards. I've adjusted windage to be exactly where I want it.
I added blue locktite to the sights a week ago so they're rock solidly mounted.
The barrel bolt is tight.
This isn't ammo, magazine, or shooter related. I tried different loads (all of which worked perfectly in the Sig, my SCAR, my ARs, etc), and have been shooting military style guns since 1984. I try to get to the range every week, and average about 180rds of 5.56 per range trip.
Any thoughts on what could be causing this? Are there any known issues with the MI sights RA use to use? Bore-axis to front sight bottom out issue? Will the rifle need "micro" height sights?
Thanks in advance.
I recently bought a used XCR-L in the high 3,000 serial number range that looked brand new. This rifle is the third XCR I've owned over the past five years. The rifle has mostly Gen 2 upper features, but mostly Gen 1 lower features (it does have the integral trigger guard).
It came with a lightweight 1/9 16" barrel without any modifications.
It came with the factory MI flip sights.
The Gen 1 trigger sucks.
Last night I took the XCR and my brand new Sig MCX (Gen 1) to the range for the first time. I had added MagPul PRO flip sights to the MCX prior to the range trip.
It took about 15rds to get the Sig zero'd at 50 yards (low 2.5" inches) and another 9rds to get it zero'd at 100 yards.
I fired 90rds through the XCR and could never get it zero'd. I bottomed out the front sight post, and the rifle is still hitting 8" low at 50, and off of 8.5x11 paper at 100 yards. I've adjusted windage to be exactly where I want it.
I added blue locktite to the sights a week ago so they're rock solidly mounted.
The barrel bolt is tight.
This isn't ammo, magazine, or shooter related. I tried different loads (all of which worked perfectly in the Sig, my SCAR, my ARs, etc), and have been shooting military style guns since 1984. I try to get to the range every week, and average about 180rds of 5.56 per range trip.
Any thoughts on what could be causing this? Are there any known issues with the MI sights RA use to use? Bore-axis to front sight bottom out issue? Will the rifle need "micro" height sights?
Thanks in advance.