Prop Jenkins will set a world record for a front-row forward when he leads Wales against Argentina in Cardiff.
The 35-year-old is making his 133rd Test appearance - still 15 behind Richie McCaw's 148 - but McBryde believes he could break the record.
"He's in a good position and I can't think of a reason why he can't," said the Wales forwards coach.
"All he has to do is keep himself fit - bearing in mind he's at the age the body is the first thing that breaks down."
Jenkins is playing his 128th game for Wales and has also made five Test appearances for the British and Irish Lions.
It takes him past former New Zealand hooker Keven Mealamu as the most-capped front-row forward and into fourth place in the all-time list which is led by All Blacks legend McCaw.
Jenkins has retained the captaincy despite the return of regular skipper Sam Warburton from injury and 14 years after making his debut for Wales.
Speaking to Welsh language broadcasters, McBryde praised Jenkins' skill and professionalism.
"His worth has been proven time after time with his defensive work and his fitness across the field," he said.
"He understands the wide game better than most of the backs and his greatest strength is what he brings to the team as an experienced voice.
"Over the years he has overcome a lot of injuries and that's a testament to how professional he has been.
"He's kept himself going through those injuries and he's dealt with the many changes there have been in the scrum and he's come through every test that's been asked of him.
"He's been one of the heroes of the national team and hopefully against Argentina we'll see a performance that proves that."

Edmund, 22, won 6-3 3-6 6-2 in a rain-delayed match to set up a last-eight tie against top-seeded Milos Raonic.
The Canadian beat Croatia's Borna Coric 6-3 7-6 (7-2) in Florida.
At the Rio Open, Britain's Jamie Murray and doubles partner Bruno Soares beat Marcus Daniell and Marcelo Demonliner 6-4 6-2 to reach the semi-finals.
They will face Argentines Andres Molteni and Diego Schwartzman next.
Meanwhile, British number four Aljaz Bedene lost 7-5 7-5 in the second round of the Open 13 in Marseille to Frenchman Lucas Pouille.

It was the final major barrier to building an additional 20,000 homes in the city over the next decade.
The Local Development Plan (LDP) sets out where new houses can be built, based on a forecast that the population will grow by a quarter over 20 years.
Cardiff council said the city was in "dire need" of the plan, to help it manage its growth.
A final decision will be made by the local authority in the coming weeks, but it is expected to be rubber stamped by the council.
Under the plan:
The inspector has not given as much protection to the greenbelt on the edge of the city as a number of councillors and residents had campaigned for.
The process has been long and controversial.
Supporters say the expansion is needed to deal with the shortage of housing in the city, while opponents claim the city's infrastructure will not be able to cope.
The plan is based on projections of a growth in the population from the 320,000 to nearly 400,000 over the period between 2006 and 2026.
The last time Cardiff grew at this scale was at the height of the coal industry a century ago.
Cardiff council cabinet member for planning and sustainability Ramesh Patel said the city was "in dire need" of the plan.
"The last plan was approved 19 years ago and has led to insufficient land being made available for urgent housing needs," he said.
"When the new plan is finally adopted at the end of January, we will ensure that developments in the city are managed effectively with new transport infrastructure, schools, health facilities and other community facilities.
"The plan gives us the control to guide development and manage the growth of the city."
Wales captain Gethin Jenkins could become rugby's most capped player if he keeps himself fit, says Robin McBryde.
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A controversial plan for the biggest expansion of Cardiff in a century has been approved by a planning inspector.