Which vise block fits your rifle and your vise?

Tools for AR builders and gunsmiths, CNC machined from solid NO-M.A.R® polymer that protects the receiver's finish. Made in San Jose, California.

Not sure? Call the shop: (408) 226-6672

Opens 3.5"

Our best seller. Tap your rifle and vise to find yours.

Multi-Cal Upper Receiver Vise Block

223308PUVB$34.99 each

Both AR-10 and AR-15 type flat tops. Listed for vises that open 3.5".

One block for both rifles. Steel pins for light duty holding.

Spec sheet

Upper blocks, by rifle and vise opening.

Each block sits under the vise opening it's listed for. None listed means we don't list a block for that opening, so call and ask.

Listed for a vise that opens

3.5"

AR-15 flat tops

BasicAR-15 flat tops223BasicUpper$23.99 each 3.5"

AR-15 Standard Upper Receiver Vise Block

StandardAR-15 flat topsPIN UPPER BLK$26.99 each 4"

AR-15 HeavyDuty Upper Receiver Vise Block

HeavyDutyAR-15 flat topsDELUXE UPPER BLK$37.99 each

.308 AR flat tops

3"None listed

3.5"

AR-10 Standard Upper Receiver Vise Block

Standard.308 ARs, SR-25, LR308, AR-10, flat tops308PUVB$30.99 each 4"

AR-10 HeavyDuty Upper Receiver Vise Block

HeavyDutyMost .308 ARs, flat tops308URVB$36.99 each

3": None listed

Both rifles in one block

3"None listed

3.5"

Multi-CalBest sellerBoth AR-10 and AR-15 type flat tops223308PUVB$34.99 each

4"None listed

3" and 4": None listed

308 Gen2 and LAR8 only

3"None listed

3.5"

308 Gen2 and LAR8 Upper Receiver Vise Block

Gen2 / LAR8Only 308 Gen2 and LAR8 flat topsGen2LAR8$37.99 each

4"None listed

3" and 4": None listed

Three AR-15 blocks. What the extra money buys.

Your vise settles most of it. For a stubborn barrel, look at the HeavyDuty.

Basic$23.99 each

Standard$26.99 each

HeavyDuty$37.99 each

Listed for a vise that opens

3.5"

Barrel work, used horizontally

Remove or install barrels

Stubborn barrels

Try the HeavyDuty, listed for a 4" vise

Heavy duty design helps remove stubborn barrels

Used vertically

Not listed

Cleaning and hand guard removal

On the bench top

Not listed

For easy manipulation

Comes with

Full width block, 6" rail cap

Full width block, 6" rail cap, two 1/4" steel pins and clips

Full width blocks, 2 anti torque plates

Clamp the block, not the receiver.

The upper sits inside the block, so your vise grips polymer. CNC machined from solid NO-M.A.R® polymer that protects the receiver's finish.

AFull width block supports the receiver in your vise.
B6" rail cap goes over the flat top.
CWorks with bolt group and handle installed or removed.

Multi-Cal block holding an upper receiver in a blue bench vise

Everything else on the bench.

All tools

Made by a plastics shop.

We run plastics all day, every day.

Where	Every part is made in our plastics shop in San Jose, California.
Who	A third-generation plastics shop with 45 years of plastics fabrication.
How	Tools are CNC machined from solid NO-M.A.R polymer. Clear acrylic is CNC cut and hand polished. Everything is made in house, no outsourcing.
The line	NO-M.A.R has been sold since 2012. The founder designed every tool in the line and the process to make it. In 2026 she chose this shop to carry it forward.
Sold	4,000+ gunsmithing tools and tool sets through our own online stores since January 2023.

"The ability to clamp the entire upper receiver in the vise instead of just the lower half makes rebarreling a snap."

Customer review

"Block is built well and strong. It fits in the lower snug as intended. A must have for assemblies and disassemblies."

Customer review

"Great Upper blocks. I am impressed. That was really fast shipping. Don't let it go. Outstanding Job."

Customer review

Buying for a shop?

Why shops stock these, the price sheet and custom work, on one page.

For shops and bulk buyers