50 Cal Machine Gun Cartridge Bottle Opener/Pen Kit

Turn genuine military brass into something you can write with — and open a cold one with. The 50 Cal Machine Gun Cartridge Bottle Opener/Pen Kit is built around an authentic once-fired .50 caliber brass cartridge, the same round first developed for the Browning heavy machine gun in the late 1910s. The result is an impressively large, one-of-a-kind ballpoint pen that also functions as a bottle opener — a combination that makes it the most conversation-starting pen kit in the shop.

What truly sets this kit apart is the bottle opener functionality built right into the design. This isn't a pen with a gimmick — it's a genuinely useful dual-purpose tool built from real military hardware. The turned wood section is fully adjustable from 1⅛" to 2" in length, letting you dial in the look and balance, and the finished pen runs from 5½" to 6⅜" overall — substantial and commanding in hand.

Features

• Authentic .50 caliber brass body: Built from a genuine once-fired cartridge casing — the same round that's been used in military Browning machine guns since WWI

• Integrated bottle opener: Fully functional bottle opener built into the design — a genuinely useful dual-purpose tool, not just a novelty

• Adjustable turned section: Turn the wood section anywhere from 1⅛" to 2" — every finished piece looks a little different and can be tuned to the turner's preference

• Large, impressive finished size: Overall length of 5½" to 6⅜" depending on turned section — this is a substantial pen that commands immediate attention

• Cross-style refill included: Comes ready to write with a Cross-compatible ballpoint refill; widely available replacements make it easy to keep writing

• Compact blank requirement: Only needs a ¾" × ¾" × 2" blank — great for using up premium offcuts and short-grain exotics

• Outstanding gift appeal: Military-themed, dual-function, and made from real brass — a standout gift for outdoorsmen, veterans, hunters, and collectors

Instructions

50 Caliber Pen Kits

Tooling Requirements

• Drill Bit: 7mm

• Bushings: Bushings — 50 Cal Ballpoint Pen Kit (#PK50CALBU)

Mix & Match:

Combine the 50 Cal Bottle Opener Pen Kit with any other single pen kits to unlock the highest discount levels!

Kit Includes

• Pen components with bottle opener (blank not included)

• Authentic once-fired .50 caliber brass cartridge body

• Brass tube

• Cross-style ballpoint refill (included)

Specifications

• Style: Ballpoint with integrated bottle opener

• Design Detail: Authentic once-fired .50 BMG military brass cartridge body; functional bottle opener

• Blank Size: ¾" × ¾" × 2"

• Drill Size: 7mm

• Turned Section: 1⅛"–2" (adjustable)

• Finished Length: 5½"–6⅜" (varies with turned section)

• Refill Type: Cross-style ballpoint (included)

Why Turners Love This Kit

• It's the only pen kit that also opens a beer — and that's exactly the story you tell at the craft fair right before someone buys it

• The real .50 caliber brass cartridge is a built-in conversation piece — every person who picks it up asks about it, and the bottle opener seals the deal

• The short 2" blank requirement makes this a great use for premium scrap offcuts — small piece, huge finished impact

• An exceptional gift for outdoorsmen, veterans, hunters, and anyone who appreciates a tool with genuine military provenance