If you are looking for an upper that has all of the upgrades, then checkout the Yankee Hill Machine Complete Black Diamond Specter XL AR-15 Upper. This complete upper is chambered in 6.8mm SPC. The barrel length is 16" and the twist rate is 1/10. The upper comes with flip up sights, a free float quad rail, and a phantom flash hider.
Specifications and Features:
Yankee Hill Machine
Complete Black Diamond Specter XL AR-15 Upper
6.8mm SPC
1/10 Twist
Flip Up Sights
Black Finish
Forged 7075-T6 Aluminum YHM Flat Top Upper Receiver
"T" Marked Upper Receiver
Forward Assist
16" 4140 Steel Barrel, Heat Treated to RC 25-32
Diamond Fluting Improves Rigidity and Aids in Barrel Cooling
Phantom 5C2 Flash Hider / Compensator
Rifle Length Diamond Handguard
Forearm Endcap
Low Profile Gas Block
Specifications and Features:
Yankee Hill Machine
Complete Black Diamond Specter XL AR-15 Upper
6.8mm SPC
1/10 Twist
Flip Up Sights
Black Finish
Forged 7075-T6 Aluminum YHM Flat Top Upper Receiver
"T" Marked Upper Receiver
Forward Assist
16" 4140 Steel Barrel, Heat Treated to RC 25-32
Diamond Fluting Improves Rigidity and Aids in Barrel Cooling
Phantom 5C2 Flash Hider / Compensator
Rifle Length Diamond Handguard
Forearm Endcap
Low Profile Gas Block
1. The twist is it 1:10 or 1:9? 2. Does it come with a charging handle? 3. Does it come with a Bolt carrier and Bolt? 4. Will it be attachable to a lower Ruger SR 5.56? 5. What type of Warranty do you offer?
Answer:
This is 1:10 twist rifling and is complete with BCG and CH and this will fit any AR-15 lower. YHM has an excellent Warranty.